Microwave the chopped chocolate and butter to melt them (for about 2 minutes at 600W) and mix them together well.
Preheat the oven to 430F/220C.
Add beaten egg into Step 1 and mix well.
Add sifted cake flour into Step 3 and mix.
Fill the molds with the mixture from Step 4 and bake in the preheated oven to 430F/220C for about 10 minutes. They are done when they begin to puff up and cracks start appearing on the surface.
The baking time varies according to the oven used so please adjust the time accordingly.
Top with powdered sugar when they are baked.
Story Behind this Recipe
I came up with my own easy and tasty version after trying out several different recipes.
I used 5 cm diameter / 4 cm high molds for baking. If you use smaller ones, reduce the baking time to 5 - 6 minutes and check if they are done. Freshly baked ones are best, but if they are cold you can reheat them in the microwave for 20 - 30 seconds to get them warm, soft, and creamy again.